Priming effect on the exceptive conditional ‘except if’

Here we report the results of one priming experiment that examines the comprehension of exceptive conditionals—for example, ‘Mary will go out tonight except if she has an exam tomorrow’—and indicative conditionals—for example, ‘Mary will not go out tonight if she has an exam tomorrow’. The experiment showed that participants read the true possibility ‘Mary is not going out tonight and she has an exam tomorrow’ faster when it was primed by an exceptive conditional than when it was primed by an indicative; other possibilities (‘Mary is going out tonight and she does not have an exam tomorrow’, ‘Mary is going out tonight and she has an exam tomorrow’ and ‘Mary is not going out tonight and she does not have an exam tomorrow’) were primed equally by both connectives. The experiments showed that (1) when people understand ‘B except if A’, they access the true possibilities ‘not-A & B’ and ‘A & not-B’, and (2) when they understand ‘B, if not-A’ they access ‘not-A & B’, but they do not access ‘A & not-B’. We discuss the implications of this for current theories of reasoning.     

Risk aversion in information seeking

The information gain model argues that participants select alternatives with a larger expected value of information gain. The present study investigated risk aversion in information seeking to examine whether the expected value always determines information-seeking behaviour. For this investigation, we used a scale method selection task in which participants were required to select one of two scales for weighing coins in order to find an underweight coin. Two experiments showed that participants more frequently selected the alternative that provided information gain without risk, although its expected information gain was smaller. This finding indicates the presence of risk aversion in information seeking, suggesting that information-seeking behaviour is affected by risk associated with obtaining information gain.     

Predicting stress patterns in an unpredictable stress language: The use of non-lexical sources of evidence for stress assignment in Russian

The main goal of this research was to examine how readers of Russian assign stress to disyllabic words. In particular, we tested the claim that the process of stress assignment in Russian can only be accomplished lexically. Eleven potential non-lexical sources of evidence for stress in Russian were examined in regression and factorial studies. In Study 1, onset complexity, coda complexity, the orthography of the first syllable (CVC1), of the second syllable (CVC2), and of the ending of the second syllable (VC2) were found to be probabilistically associated with stress in Russian disyllables. In Studies 2 and 3, it was shown that Russian speakers do use 3 of these cues (CVC1, CVC2, and VC2) when making stress-assignment decisions. These results provide evidence against the idea that the nature of stress in the Russian language is so unpredictable that stress assignment can only be accomplished lexically. These results also suggest that any successful model of stress assignment in Russian needs to contain mechanisms allowing these 3 orthographic cues to play a role in the stress-assignment process.     

Time-series analysis of the relationship between dizziness and stress

Ten individuals with dizziness participated in a longitudinal study on the relationship between stress and dizziness. The participants rated dizziness and stress on visual analogue scales twice daily for a period of 28 days (in all 56 data points). The ratings of stress included physical stress, mental stress, emotional stress, and the presence of stressful events. The data was analysed by means of time-series analysis (ARIMA), and the temporal associations investigated by lagged correlations. Results showed concurrent associations between dizziness and mental and emotional stress. However, individual differences were observed indicating complex and diverse patterns of association between different forms of stress and dizziness.     

Cognitive Load and the Equality Heuristic: A Two-Stage Model of Resource Overconsumption in Small Groups

Two studies were conducted to test a two-stage model of the psychological mechanisms underlying the overconsumption of scarce resources in small groups. The model proposes that members of groups sharing resources first anchor their consumption choices on an “equal-division” heuristic and then, given sufficient cognitive capacity, adjust their choices in a self-serving direction. The results from both studies support the model. The first study found that when faced with a common resource pool almost all group members expressed thoughts regarding equality; however, individuals with sufficient cognitive capacity requested more from the pool and expressed more task-relevant thoughts than individuals lacking the necessary cognitive resources. The second study provided additional support for the two-stage model by demonstrating that group members' cognitions occur in the order predicted by the model and by demonstrating that an individual difference, social value orientation, affects thought processes only when individuals are not experiencing high cognitive loads. Implications are discussed.     

人类基因组计划与医学模式

人类基因组计划将为医学科学的发展提供广泛的可能性,并结生物医学带来革命性的变化,但是人类的社会性,疾病产生的非生物因素以及社会及伦理的限制都决定了任何生物医学上的成就,包括人类基因组计划都不能改变生物社会心理医学模式的深刻内涵。     

加速卫生改革迎接入世挑战

中国即将加入WTO。加入WTO后 ,随着中国服务贸易业的对外开放 ,给与健康有关的医疗健康服务带来了前所未有的挑战和机遇。分析我们即将面临的挑战、风险和压力 ,并提出深化卫生改革 ,提高竞争实力的对策。     

Recognizing Racit Knowledge in Medical Epistemology

The evidence-based medicine movement advocates basing all medical decisions on certain types of quantitative research data and has stimulated protracted controversy and debate since its inception. Evidence-based medicine presupposes an inaccurate and deficient view of medical knowledge. Michael Polanyi’s theory of tacit knowledge both explains this deficiency and suggests remedies for it. Polanyi shows how all explicit human knowledge depends on a wealth of tacit knowledge which accrues from experience and is essential for problem solving. Edmund Pellegrino’s classic treatment of clinical judgment is examined, and a Polanyian critique of this position demonstrates that tacit knowledge is necessary for understanding how clinical judgment and medical decisions involve persons. An adequate medical epistemology requires much more qualitative research relevant to the clinical encounter and medical decision making than is currently being done. This research is necessary for preventing an uncritical application of evidence-based medicine by health care managers that erodes good clinical practice. Polanyi’s epistemology shows the need for this work and provides the structural core for building an adequate and robust medical epistemology that moves beyond evidence-based medicine.An erratum to this article can be found at     

The tripartite influence model of body image and eating disturbance: A replication with adolescent girls

The tripartite influence model of body image and eating disturbance is a recent theoretical approach that includes a test of direct (peer, parental, and media factors) and mediational links (internalization of societal appearance standards, appearance comparison processes) as factors potentially leading to body dissatisfaction and eating disturbance. The theory was evaluated in the current study in a sample of 391 adolescent females. A structural equation model that evaluated the tripartite model replicated previous findings reported by Keery, van den Berg and Thompson (2004) [Keery, H., van den Berg, & Thompson, J. K. (2004). A test of the tripartite influence model of body image and eating disturbance in adolescent girls. Body Image: An International Journal of Research, 1, 237–251.]. Additionally, a second model extended these findings, suggesting that peer and media influences are more important than parental influences. The results are discussed in light of the need for prevention programs to incorporate formative influences and mediational processes in the construction of intervention strategies.